Jeffrey S. Graham (Psyren) is a Bloodite who created the first version of Blood TC and later along side Joseph Otey (Doorhenge) created the second version of Blood TC. Otey later convinced Graham to switch engine from the original Doom engine over to the more technically advanced ZDoom engine. Both Otey and Graham worked on ZBlood, with Otey assuming the main role in its creation mostly because of his greater knowledge of ZDoom. The official website of ZBlood was hosted on Jeffrey Graham's personal website.